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Problem to start when the engine is hot
#60
when your 1.6L engine runs perfect, in closed loop , you will see that
the CO2 is at max. at perfect burn and a CAT that is hot, working like new, makes more (adds) to total CO2 emitted. "NORMAL"!

do you understand why? the below equations show this clearly.
then the CAT makes more.(killing HC (raw fuel) and lowering CO. and NOX.

http://chemwiki.ucdavis.edu/Physical_Che...Converters

[Image: 3_23_12_15_8_03_52.jpeg]


THe EGR, is opened and NOX is reduced 1st at the source but never to zero in the combustion chamber
same with HC and CO.
The purpose of the CAT is to cleanup that which the EFI can't clean, at burn time.

in the old days they tuned the car to low CO.
nobody tunes to CO2, unless peaking it. see why.?
when burning at perfect combustion, CO2 is max. it's a goal. not a bad thing.

The only way to lower CO2 is lower DISPLACEMENT.
that lowers engine power, and lowers CO2. (the reason for 1Liter turbos)!
(assumes same engine technology , mr, Otto Cycle)

The worst of all IS CO. (people next engine)
CO, makes your red blood cells , GO OFF LINE. (hyperbaric chamber time, is only hope)


I the engine runs in closed loop at 2500 rpm (scan tool shows this)
and the 02 is new.. (we can get them for $30 here)
and the 02 is not getting hit by air leaks, at the header end there. (exh, manifold end)
then the CAT is NO GOOD.

i really look at all 31 scan tool parameters at the 2500 RPM like a hawk.

id love to see your smog chit, (receipts) number speak load, here.
this car will love to fail
for high NOX first. (EGR dead) i bet your car has no code 51 like ours do.
then High HC, (bad cat or engine so rich the cat runs red hot, and cant keep up)
last CO high, CO will be high with HC high , due to incomplete combustion.

CO2 is now not an issue ,but will be too low, on engine running bad.
if you burn all the fuel HC< CO2 goes max.

top lower CO2, you'd have to kill a cylinder dead, (spark and fuel). or lower the compression ratio.
or the easy way like on old race cars (with illegal sized engines. say a 350cubic inch in a 300 cube race. (we did this hard top racing)
the Throttle valve, restriction plate.! (we had to use one)
less air, less fuel, less CO2. (and less power)
http://www.fixkick.com
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RE: Problem to start when the engine is hot - by fixkick - 12-24-2015, 06:21 AM

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